I just read this pretty humorous article that piggybacks on the Darth Vader/Yoda announcement in Soul Calibur. It has some pretty funny ideas for other video game cameos. Godzilla in Turok, Samus in Megaman, etc.

http://www.gamealmighty.com/l/story-...y/Cameo_Chaos/

What else would make for some interesting video game cameos?